Jake Joo

Building Korea's only DART-native API

About

I'm Jake, building SEFCON — the only Korean stock API that parses DART XBRL directly instead of reselling FnGuide or KisValue data. 1,200+ KOSPI/KOSDAQ companies. 10-year financials. Real-time disclosures in English. Sector cycle signals. Previously impossible to get this data without a Bloomberg terminal or a Korean data vendor contract. Building in public. Always happy to talk Korean markets, quant strategies, or data infrastructure.

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Tastemaker

Gone streaking

Maker History

SEFCON Korean Stock APIDART XBRL API for Korean stocks — 1,200 companies
Jul 2026

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Joined Product HuntJuly 21st, 2026

Forums

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17h ago

SEFCON Korean Stock API - DART XBRL API for Korean stocks — 1,200 companies

The only source-accurate Korean stock fundamentals API. We parse DART XBRL directly — not resold, not scraped. 1,200+ KOSPI/KOSDAQ stocks, 10-year financials, SCI quality scores, sector cycle detection, and macro crisis index with AUROC 0.927. Free plan available on RapidAPI.